Hong Kong stocks tanked on Wednesday on worries about China's economy.

The Hang Seng Index plunged 3.7 percent, or 589 points, to 15,276.

The Shanghai Composite Index closed down 2.1 percent, or 60 points, at 2,833, and the Shenzhen Composite Index dived 2.5 percent, or 44 points, to 1,698. (AFP)